dzhokhar tsarnaev could face federal charges today. he'll most likely be tried in civilian court despite some calls to have him held as an enemy combatant. >> i believe he should be treated as an enemy combatant for the purpose of interrogation. the reason for it is there are so many questions unanswered. there are so many potential links to terrorism here. also the battlefield is now in the united states. i believe he is an enemy combatant. and he would not be tried before a military commission. ultimately he would be tried in a civilian court and the statements taken from him cannot be used against him in that trial. >> the obama administration has agreed to delay a reading of his miranda writes under a public safety exemption. secretary of defense chuck hagel said sunday he has not seen evidence to link the bombings to terror groups. now, scrutiny turns to the fbi who reportedly questioned the older brother, tamerlan, in 2011, at the request of a foreign government. this is so interesting. of russia. but the fbi told the a.p. despit